2021 Update: http://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/ssbypass/ssbypass.htmOld post:Many people, myself included, like to be able to run their 4 valve K bikes with the side stand down.
Here's three options for bypassing the side stand switch:
a) Purchase BMW part number 61121459998 and plug that into the side stand wiring harness connector under the seat on the right side. The name of that part is a "contact ring."
b) The part above is just a loop of wire that shorts the two terminals fooling the Motronic into thinking that the side stand is up. All you really need to do is cut the two wires (brown and brown/blue) and connect them.
c) Do a or b above and then wire the side stand switch up to a relay that illuminates a warning light to let you know that the side stand is still down. (what I do on my bikes - and it still isn't 100% effective :o)
DISCLAIMER: When you bypass the side stand switch you are overriding a safety feature BMW built into the bike. Riding off with the side stand down can be dangerous. If you decide to do this then you do so
at your own risk.Disclaimer aside, if you do ride off with the side stand down and try to make a left turn then it tends to be self-retracting once it first touches the ground without disrupting the bike too much but it will still screw up your first left turn so if your first left turn is at speed on a tight turn then you could be in for a world of hurt.